* {
  margin: 0;
  padding: 0;
  text-decoration: none;
  list-style: none;
  font-family: 'pingfang sc' 'source han sans cn' 'microsoft yahei' monospace;
}
main {
  padding: 0 10vw;
  background-color: #FF8787;
}
main .introduce {
  overflow: hidden;
  padding: 100px 0;
}
main .introduce h3 {
  text-align: center;
  font-size: 30px;
}
main .banner {
  width: 80vw;
  height: 500px;
  overflow: hidden;
  position: relative;
}
main .banner .img-box {
  position: absolute;
  display: flex;
  top: 0%;
  left: 0%;
}
main .banner .img-box li {
  height: 500px;
  width: 80vw;
  flex-shrink: 0;
}
main .banner .img-box li img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
main .banner .left-btn {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
main .banner .left-btn:hover {
  background-color: rgba(255, 255, 255, 0.6);
}
main .banner .left-btn:hover svg {
  opacity: 1;
}
main .banner .left-btn svg {
  height: 40px;
  width: 40px;
  fill: #ff8787;
  opacity: 0;
}
main .banner .right-btn {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
main .banner .right-btn:hover {
  background-color: rgba(255, 255, 255, 0.6);
}
main .banner .right-btn:hover svg {
  opacity: 1;
}
main .banner .right-btn svg {
  height: 40px;
  width: 40px;
  fill: #ff8787;
  opacity: 0;
}
